My "mulch" isn't store-bought, it's a mix of leaves, contents of mower bag, some pine needles, some sawdust, whatever presents itself, whenever it presents itself. It's not there in regard to its' appearance, but to do a job.
When I have bought mulch, it was always shredded hardwood. I can't imagine anything else being worth buying, assuming the mulch will be expected to achieve the dual goals of enhancing the soil and to help the plants to be as healthy as possible.
There is nothing wrong with having another goal, and to help guide someone toward a goal, others need to know what it is.